MHT CET · Physics · Magnetic Properties of Matter
The permeability of a metal is \(0.1256 \mathrm{TmA}^{-1}\). Its relative permeability will be \(\left(\frac{\mu_0}{4 \pi}=10^{-7}\right.\) SIunit \()(\pi=3.14)\)
- A \(10^5\)
- B \(3 \times 10^5\)
- C \(2 \times 10^6\)
- D \(10^4\)
Answer & Solution
Correct Answer
(A) \(10^5\)
Step-by-step Solution
Detailed explanation
\(\begin{aligned} & \mu=0.1256 \\ & \mu_0=4 \pi \times 10^{-7}=4 \times 3.14 \times 10^{-7} \\ & =12.56 \times 10^{-7} \mathrm{TmA}^{-1} \\ & \mu_{\mathrm{r}}=\frac{\mu}{\mu_0}=\frac{0.1256}{12.56 \times 10^{-7}}=10^5\end{aligned}\)
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- The translational kinetic energy of the molecules of a gas at absolute temperature ( \(\mathrm{T}\) ) can be doubledMHT CET 2021 Easy
- A \(5 \mathrm{~m}\) long aluminium wire \(\left(Y=7 \times 10^{10} \mathrm{Nm}^{-2}\right.\) ) of diameter \(3 \mathrm{~mm}\) supports a \(40 \mathrm{~kg}\) mass. In order to have the same elongation in the copper wire \(\left(Y=12 \times 10^{10} \mathrm{Nm}^{-2}\right)\) of the same
length under the same weight, the diameter should now be (in \(\mathrm{mm}\) )MHT CET 2009 Hard - In a Wheatstone bridge, three resistance \(P, Q\) and \(R\) are connected in the three arms and the fourth arm is formed by two resistances \(S_1\) and \(S_2\) connected in parallel. The condition for the bridge to be balanced isMHT CET 2021 Medium
- A musical instrument X produces sound waves of frequency n and amplitude A . Another musical instrument \(Y\) produces sound waves of frequency \(\frac{\mathrm{n}}{3}\). The waves produced by x and y have equal energies. The amplitude of waves produced by Y will beMHT CET 2024 Medium
- A bar magnet \(\mathrm{AB}\) is cut into two equal parts. ( as shown in figure). One part is kept over the other so that the pole \(\mathrm{C}_{2}\) is above \(\mathrm{C}_{1}\). If \(\mathrm{M}\) is the magnetic moment of the
original magnet, the magnetic moment of the combination so formed is
MHT CET 2020 Easy - A potentiometer is used to measure the potential difference between \(\mathrm{A}\) and \(\mathrm{B}\), the null point is obtained at \(0.9 \mathrm{~m}\). Now potential difference between \(\mathrm{A}\) and \(\mathrm{C}\) is measured, the null point is obtained at \(0 \cdot 3 \mathrm{~m}\). The ratio \(\frac{\mathrm{E}_{2}}{\mathrm{E}_{1}}\) is \(\left(\mathrm{E}_{1}>\mathrm{E}_{2}\right)\)
MHT CET 2020 Medium
More PYQs from MHT CET
- Which of the following is effectively used to remove E. coli bacteria from water?MHT CET 2025 Easy
- Calculate the volume of unit cell if an element having molar mass \(92 \mathrm{~g} \mathrm{~mol}^{-1}\) that forms bcc structure \(\left[\varrho \times \mathrm{N}_{\mathrm{A}}=5.0 \times 10^{24} \mathrm{~g} \mathrm{~cm}^{-3} \mathrm{~mol}^{-1}\right]\)MHT CET 2024 Easy
- If \(f(x)=e^{|x|}, g(x)=\log x\), then \((g\) of \()(x)=\)MHT CET 2022 Easy
- An uncharged capacitor is connected to a battery. While charging the capacitor, how much is the energy lost, from the energy supplied by the battery?MHT CET 2022 Medium
- Match column I with column II and select the correct option.
Column I Column II i. Frontal lobe a. Gustato receptors ii. Parietal lobe b. Olfactory receptors iii. Temporal lobe C. Sense of vision iv. Occipital lobe d. Broca's area MHT CET 2024 Hard - A body performs linear simple harmonic motion of amplitude 'A". At what
displacement from the mean position, the potential energy of the body is one
fourth of its total energy?MHT CET 2020 Easy